Microsoft's entertainment-oriented app lets you use your Windows device -- probably a tablet or smartphone -- as a second screen to compliment your Xbox 360 activities. For instance, the Xbox SmartGlass app could display additional details on characters or locations for a TV show you're watching on the living room HDTV. SmartGlass also works with Windows Phone, Apple iOS and Android devices, and is clearly built for fun. This could change in a hurry, however, if enterprises find uses for the innovative technology. As InformationWeek's Paul McDougall points out, financial traders could use SmartGlass technology on mobile devices to view news and other metrics while making trades on a desktop display.